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2. Battery charger - Wikipedia

   en.wikipedia.org/wiki/Battery_charger

   A battery charger, recharger, or simply charger, [1] [2] is a device that stores energy in an electric battery by running current through it. The charging protocol—how much voltage and current, for how long and what to do when charging is complete—depends on the size and type of the battery being charged.

3. Automobile auxiliary power outlet - Wikipedia

   en.wikipedia.org/wiki/Automobile_auxiliary_power...

   Trickle chargers also sometimes connect in this way, eliminating the need to leave a vehicle's hood open, as well as eliminating the possibility of reversed polarity. Most cars nowadays are designed with a battery-negative earthing system and therefore have a +12V positive power distribution.

4. Automotive battery - Wikipedia

   en.wikipedia.org/wiki/Automotive_battery

   A typical 12 V, 40 Ah lead-acid car battery. An automotive battery, or car battery, is a rechargeable battery that is used to start a motor vehicle.. Its main purpose is to provide an electric current to the electric-powered starting motor, which in turn starts the chemically-powered internal combustion engine that actually propels the vehicle.

5. AC adapter - Wikipedia

   en.wikipedia.org/wiki/AC_adapter

   [20] Electric fans, lamps, alarms, coffee warmers, battery chargers, and even toys have been designed to tap power from a USB connector. Plug-in adapters equipped with USB receptacles are widely available to convert 120 VAC or 240 VAC power or 12 VDC automotive power to 5 VDC USB power (see photo at right).

6. Coaxial power connector - Wikipedia

   en.wikipedia.org/wiki/Coaxial_power_connector

   A common coaxial power connector, male (left) and female (right), 5.5 × 2.5 mm. Connector gender is determined by the center contact. Note: connectors depicted do not connect with each other.

7. DC connector - Wikipedia

   en.wikipedia.org/wiki/DC_connector

   In the interest of improved interoperability of phone battery chargers, major manufacturers have agreed to standardize on the micro-USB connector for new phone chargers from 2010. [16] Many manufacturers make special-purpose DC power connectors for battery packs, instruments, medical equipment, communications equipment and other devices.